Abstract
The objective of this study was to evaluate bone formation after application of different doses of recombinant human bone morphogenetic protein-2 (rhBMP-2) combined with monoolein or poloxamer gels, in critical bone defects of rats. Forty-five Wistar rats were divided into nine treatment groups with five animals each: I: application of 1 µg rhBMP-2 + monoolein; II: 3 µg rhBMP-2 + monoolein; III: 7 µg rhBMP-2 + monoolein; IV: 1 µg rhBMP-2 + poloxamer; V: 3 µg rhBMP-2 + poloxamer; VI: 7 µg rhBMP-2 + poloxamer; VII: monoolein only; VIII: poloxamer only; and IX: critical bone defect only. A critical-sized defect of 6 mm diameter was produced in the left parietal bone and it was filled with gels of the above mentioned treatments. After 2 weeks, the calvarial bones were removed for histological processing. Bone formation in the groups that received poloxamer gel and rhBMP-2 was not significantly different from the control group (IX). Groups receiving monoolein and rhBMP-2 (1 and 3 µg) and those that received only the carriers (VII and VIII) had less bone formation in relation to the control. The association of rhBMP-2 to both poloxamer and monoolein did not exhibit any significant differentiation in bone formation in comparison with the control group.
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We are grateful to Fapesp for financial support (Process Number: 2007/58338-6).
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Abdala, P.M.F., Iyomasa, M.M., Sato, S. et al. Osteoinductivity potential of rhBMP-2 associated with two carriers in different dosages. Anat Sci Int 85, 181–188 (2010). https://doi.org/10.1007/s12565-010-0075-5
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DOI: https://doi.org/10.1007/s12565-010-0075-5